6. didn't go - wasn't

7. have done

8. have you lived

9. has taught - graduated

10. left - have never met

11. did you spend

12. were - lived

13. am reading 

14. have you known - have known

15. haven't seen - were

16. will finish

17. saw

18. were you been - went

19. haven't eaten

20. moved - have lived

IV.

1. Minh told Ba if he could help him with his English speaking.

2. The teacher said to Trung not to make noise in class.

3. Tom told Jerry if she could wait for him there.

4. Nam asked Ha if she could buy him an English exercise book.

5. Toan's father told him to get up early to learn his lesson.

6. Nga's teacher said to her to improve her English pronunciation.

Bài 3

6)

didn't go sửa thành wasn't

7)

have sửa thành done

8)

have you lived

9)

has taught sửa thành graduated

10)

left sửa thành have never met

11)

did you spend

12) were sửa thành lived

13)

am reading 

14)

have you known sửa thành have known

15)

haven't seen sửa thành were

16)

will finish

17)

saw

18)

were you been sửa thành went

19)

haven't eaten

20)

moved sửa thành have lived

Bài 4

1)

Minh told Ba if he could help him with his English speaking.

2)

The teacher said to Trung not to make noise in class.

3)

Tom told Jerry if she could wait for him there.

4)

Nam asked Ha if she could buy him an English exercise book.

5)

Toan's father told him to get up early to learn his lesson.

6)

Nga's teacher said to her to improve her English pronunciation.